Questions about "Life Counter" mission

I am not sure if the assertions of this mission are correct.
The first assertion has only 7 rows, while the picture in the mission shows 8 rows.
If I add [0,0,0,0,0,0,0,0] to the initial state then the correct result will appear.

In the second example my algorithm returns 11 and not 15. I don't know why that is. 11 seems correct.
Also there seems to be a row missing, too.

In the third example the result should be 4 and not 5.
Here are the states:
Initial:
[0, 1, 0]
[0, 0, 1]
[1, 1, 1]

After 1st tick:
[0, 0, 0]
[1, 0, 1]
[0, 1, 1]

After 2nd tick:
[0, 0, 0]
[0, 1, 1]
[0, 1, 1]

And from now on nothing will change. So why should there be 5 alive cells after tick 50?

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